Hello, As I see it, if a "client" knows the gateway address and subnet mask, then they can just edit their tcp/ip configuration manually and "hope" to use an unassigned address, thus bypassing DHCP all together. Additional knowledge of the network makes this easier... This does allow a client to use the network for accessing the internet, if such access is possible from the network segment they happen to be on. Anyway, the University of Utah has a product called ANA - Authenticated Network Access that addresses this issue. Basically even if a user has a valid ip configuration they cannot use the network unless they are authenticated by an id/passwd combination. http://www.netcom.utah.edu/ana/
Good luck Fred ----- Original Message ----- From: "Sarbjit Singh Gill" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, December 02, 2002 7:22 AM Subject: Preventing DHCP from allocating IPs > Greetings all, > > How do i prevent a client from getting an IP from my DHCP in an Ethernet > network. I know i could reserve IPs for all other clients and nobody gets an > IP unless reserved earlier, but i have hundreds of clients. I frequently > have visitors who need to plug in their laptops into the network and i have > visitors who are not allowed to plug in their laptops into the network and > get IPs. I do not want these visitors who are not allowed to access the > network to get an IP and start accessing internet through my network. > > What about in a wireless environment. How do i prevent it in a similar > capacity. > > Kind Regards > Gill >
